This Jacobs ISO 529/2283 tap collet with overload clutch has a tap size no.1 of M4 with a 3.2-mm tap shank and 2.5-mm drive square. The Jacobs ISO 529/2283 tap collet features a quick change style allowing taps to be changed quickly.. The Jacobs ISO 529/2283 tap collet's rigidity provides reliable and easy use for general tapping applications while the torque structure limits can prevent breakage. The Jacobs ISO 529/2283 tap collet is used for drilling, radial drilling, milling and air tapping and is suitable for CNC turning centers and machining centers with reversible spindles. Like all of Jacobs chuck's products the Jacobs ISO 529/2283 includes a one year factory warranty